MOAC - Inventory Organization Items not visible in Core Purchasing & iProcurement - 12.1.3

We have a requirement where we have defined single operating unit with following Inventory Org Structure:

Master Item Organization

Child Org A

Child Org B

We have define items in both child organizations, and in purchasing financial options we have assigned Child Org A.

When we are trying to raise a requisition for Child Org B, Items are not visible. Only Items for Child A are visible.

Please suggest. Do we need to set profile options. We have defined two locations with default Inv Org - Child A & B.

Regards,